高じん性化エポキシ系接着剤のモードI荷重下における疲労き裂進展特性 : き裂進展挙動に及ぼすガラスビーズ混入/ゴム変性, 接着剤層厚さの影響

概要

論文の詳細を見る
Fatigue crack growth resistance was greatly increased due to inclusion of glass beads, CTBN and CNBR modifications at the second stage of the crack growth (da/dN=10^<-4>-10^<-3>mm/cycle), although an increase in the observed toughness depended on the inclusions. The resistance of the CNBR-modified adhesive was higher than that of the glass-bead-reinforced and the CTBN-modified adhesives at this range. However, the energy release rate at threshold for both CNBR-and CTBN-modified adhesives was lower than that for the unmodified adhesive. In particular, the threshold reduction for the CNBR-modified adhesive was remarked while the threshold reduction for the glass bead-reinforced adhesive was slight. The effect of adhesive thickness on fatigue crack growth decreases due to CTBN and CNBR modifications. Fracture surface observation revealed that the fatigue crack growth mechanisms in all toughened epoxy adhesives involved some crack path deflections. Adding glass beads to CNBR-modified adhesives improved the threshold reduction.
一般社団法人日本機械学会の論文
1997-08-25